Restoration of the Palace of Westminster: Costs up to 40 Billion Pounds and Duration up to 61 Years

London – 16.06.2026: The extensive restoration of the Palace of Westminster, the seat of the British Parliament, faces a significant challenge. A recent report by the National Audit Office (NAO) estimates that renovation costs could reach up to 40 billion pounds and span a period of up to 61 years. This estimate is based on two different restoration options currently under discussion.

The first option, called “Full Decant,” envisions both the House of Commons and the House of Lords vacating the building for the entire duration of the renovation. This solution would take between 19 and 24 years and incur costs of up to 15.6 billion pounds. This would allow the work to be carried out more focused and efficiently.

The second option, known as “Enhanced Maintenance and Improvement+” (EMI+), involves phased restoration, with parts of Parliament continuing to be used during the construction phase. This method spans a period of 38 to 61 years and is estimated to cost up to 39.2 billion pounds. The advantage lies in the continuation of parliamentary operations, but the longer construction time significantly increases overall costs.

Regardless of the restoration strategy chosen, the report recommends an initial phase lasting up to seven years and costing around 3 billion pounds. This work includes the construction of temporary chambers and offices, renovation measures at the Victoria Tower, as well as preparatory restorations at the medieval Cloister Court.

The NAO report emphasizes the urgency of the restoration, as the building faces significant structural problems. These include outdated mechanical and electrical systems, fire risks, and high asbestos levels. Currently, 1.5 million pounds are spent weekly on maintenance and repairs alone, without addressing the underlying deficiencies.

The decision on the preferred restoration option is expected within the coming years. A final choice is anticipated by mid-2030 at the latest. This decision will be crucial for the future condition of the parliamentary building and the design of the restoration work.

The restoration of the Palace of Westminster is not only a technical construction project but also a political challenge. Critics call for more transparency and accountability in the handling of public funds given the high costs and lengthy timeframe. At the same time, ongoing delays may further increase costs.

The progress and outcome of this restoration project will have a significant impact on British politics and public confidence in major government construction projects. The demands of heritage preservation and the need for modern security standards must be carefully balanced.